Manual SMTP Relay Test

220 mail.example.com ESMTP Postfix
'''EHLO example.com'''
250-mail.example.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-XVERP
250 8BITMIME
'''mail from:<user@domain.com>'''
250 Ok
'''rcpt to:<howto@domain.com>'''
250 Ok
'''Text'''
354 End data with <CR><LF>.<CR><LF>
'''Testmail relaying mail from user@domain.com to howto@domain.com'''
'''Test #3'''
'''.'''
250 Ok: queued as 84BA64078A
'''quit'''
221 Bye